Hillary Clinton was supposed to have turned over all work-related emails to the State Department to be released to the public, but an agency audit found at least three emails never seen before which all pertained to her unauthorized private email server.

One of them included Clinton's own explanation of why she wanted her emails kept private.

In a November 2010 message, Clinton expressed concern to Huma Abedin that her personal messages would be accessible to the public. Two other messages a year later divulged possible security weaknesses in the home email system she used while secretary of state.

The Clinton campaign has previously denied that her home server was breached, but newly revealed emails show an aide worried it could have been compromised.

The existence of these previously unreleased messages, apparently found among electronic files of four former top Clinton State Department aides, have renewed concerns that Clinton was not completely forthcoming when she turned over a trove of 55,000 pages of work-related emails.

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